Toothbrush



FIG. 1 is a perspective view from the front and one side of the toothbrush;

FIG. 2 is a front view of the toothbrush;

FIG. 3 is a rear view of the toothbrush;

FIG. 4 is a perspective view from the other side of the toothbrush; and,

FIG. 5 is a top plan view of the toothbrush.

The bottom of the toothbrush forms no part of the claimed design. 

The ornamental design for a toothbrush, as shown and described. 